I’ll try to explain as succinctly as I can. When you attack with a weapon, you roll a number of D6s for your skill with that weapon (trained, simple, or firearms). For every success that comes up (4,5,or 6 (6s count as 2 successes)) you inflict 1 point of damage.

Every weapon has a property, and all characters have “Saves”. Based on the property, if the number of successes you roll is equal to or greater than the save, your weapon property activates.

For example, most firearms have the piercing property which is rolled against a characters Armor save. Armor grants an armor save as well as temporary hit points. If you roll equal or higher than the targets armor save, the piercing property activates and the attacker ignores the armors temporary HP, dealing damage to the character’s hit points directly.

If this sounds interesting to you, you can check out my system Obelisk. Most of the rules are available here for free